polygons

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sets spatial coordinates to create spatial data, or retrieves spatial coordinates

sets spatial coordinates to create spatial data, or retrieves spatial coordinates

Keywords
manip
Usage
polygons(obj)
	polygons(object) <- value
Arguments
obj
object of class "SpatialPolygons" or "SpatialPolygonsDataFrame"
object
object of class "data.frame"
value
object of class "SpatialPolygons"
Value

  • polygons returns the SpatialPolygons of obj; polygons<- promotes a data.frame to a SpatialPolygonsDataFrame object

Aliases
  • polygons<-
  • polygons
Examples
grd <- GridTopology(c(1,1), c(1,1), c(10,10))
polys <- as.SpatialPolygons.GridTopology(grd)
centroids <- coordinates(polys)
x <- centroids[,1]
y <- centroids[,2]
z <- 1.4 + 0.1*x + 0.2*y + 0.002*x*x
df <- data.frame(x=x, y=y, z=z, row.names=sapply(slot(polys, "polygons"), function(i) slot(i, "ID")))
polygons(df) <- polys
class(df)
summary(df)
Documentation reproduced from package sp, version 0.9-94, License: GPL (>= 2)

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